How was the Immigration Act of 1924 a means of fulfilling the desire of some Americans to stop the spread of "undesirables", and why did they want them stopped?

Immigration Act of 1924

Explanation:

The Immigration Act of 1924 limited the number of immigrants coming into the United States. For the first time, this act limited immigration in the country by establishing a national origin quota system. They tried to reduce immigration because of World War I and the dislike of foreigners particularly from Russia and Eastern Europe. The 1924 act excluded effect on Asian or African immigration.

Senator Meyer Jacobstein argued against immigration limitations in 1924 in a congressional speech. He gave his statement supporting the Constitution, which allowed everyone to be equal in America. According to him, the 1924 Act put specific people in the status of superior and another as inferior.